/Engine/Plugins/Online/OnlineSubsystem/Source/Public/Interfaces/OnlinePartyInterface.h
virtual [FDelegateHandle](API\Runtime\Core\Delegates\FDelegateHandle) AddOnPartyRequestToJoinRemovedDelegate_Handle ( const [FOnPartyRequestToJoinRemovedDelegate](API\Plugins\OnlineSubsystem\Interfaces\FOnPartyRequestToJoinRemovedDele-) & Delegate )